<div class="relative">
  <div class="text-center w-60 h-full leading-none bg-opacity-70 absolute left-24 bg-yellow-200 zIndex">z-index: 1000</div>
  <button class="mb-4" tiButton [tiTip]="tipStr" tiTipPosition="right">tip的z-index:5000</button>
  <br />
  <button tiButton [tiTip]="tipStr" tiTipPosition="right" tiTipZIndex="600">tip的z-index:600</button>
</div>
